Creating classes

Program Objective:
Create class named quark which will store the name (up, down, charm, strange, top or bottom), charge (+2/3, -1/3, +2/3, -1/3, +2/3, -1/3 e) and mass (1.5-3.3, 3.5-6.0, 1,160-1,340, 70-130, 169,100-173,300 or 4,130-4,370 MeV/c^2). The quark class should be able to set and get each of the member data. The set functions should validate input values.

Create a program that creates an array of 5 quark objects, sets their values randomly and display the quarks sorted by their mass.

Include documentation for your class definition and implementation.

Member Function Names:
quark
~quark
setMass
getName
getCharge
getMass

Thats my assignment. This is what i have written for the header but i'm not sure if its correct. Not sure if the format is correct and not sure when to use const.